Few rounds of technicals, call with recruiter (HR), made it to the on-site interview. After I gave my presentation, I took a written multiple-choice test. While they were grading that, I went on the facility tour and was asked a bunch of technical questions. I truly thought I did well on this, but as I got back from the tour, the recruiter informed me that the team decided to not move forward for the one-on-ones that were scheduled. This was a super frustrating part of the process.

Describe what happens to compressible flow in a converging-diverging nozzle.